Aib-heater



UNITED STATES PATENT OFFICE;

WILLIAM SAGE, OF DURHAM, CONNECTICUT.

AIR-HEATER.

Specification of Letters Patent No.

To all whom, it may concern:

Be it known that I,W1LLIAM SAGE, of Durham, in the county of Middlesexand State of Connecticut, have invented a new and Improved Air-Heater orAir-Heating Furnace; and I do hereby declare that the following is afull and exact description thereof, reference being had to theaccompanying drawings, making a part of this specification.

The nature of my invention consists in such an arrangement of the airheater, or furnace, that the cold air is made to pass through seriesofinclined lateral pipes 72, 2), into series ofshort annular, or dividedsegmental compartments a, a, placed one above another around the firechamber 0, and having apertures for the discharge of the heated airtherefrom into the hot air reservoir 6, surrounding the said series ofheatlng compartments, substantially as hereinafter set forth.

In the accompanying drawings, Figure 1, is a vertical central section inthe line 00, w, of Fig. 3; Fig. 2, a vertical section in the line y, y,of Fig. 3; and Fig.3, a horizontal section in the line 2, z, of Fig. l.

Similar letters indicate like parts in all the figures.

The chamber of combustion c, and its grate f, should be constructed ofsuitable materials and in such a manner as to best adapt it to the fuelto be consumed therein. The outer surface of the said fire chamber 0,has short air heating compartments a, 0, arranged one above anotheraround it, which receive the air to be heated through the inclinedinduction tubes '2), b, and discharge the heated air therefrom throughthe apertures 2', i, into the hot air reservoir e, surrounding saidcompartments. The air heating compartments a, a, may extend entirely12,425, dated February 20, 1855.

around the fire chamber 0, or be divided into short compartments, asshown in the drawings.

The size of the air induction pipes Z), I), should bear such aproportion to the areas of the heating surface of the compartments a, a,that the air will be raised to a proper degree. of temperature inpassing through said compartments. I The object of surrounding thechamber of combustion c, with series of short independent compartments,combined with series of induction pipes, is to insure the direct contactof the air with the heating surface, as it enters the apparatus, andthen to pass immediately from said surface into the hot air reservoir,thereby causing the air to be equally and uniformly heated, andpreventing the air from remaining in contact with the heating surfacelong enough to be decomposed.

Having thus fully described my improved air heater, or air heatingfurnace, what I claim therein as my invention and desire to secure byLetters Patent, is

Surrounding the chamber of combustion with series of short annular, orsegmental, air heating compartments ct, a, which are combined withseries of inclined air induction pipes 79, Z), and communicate with thehot air reservoir 0, which surrounds said compartments, by means of the'eduction apertures i, a, substantially in the manner and for thepurpose herein set forth.

The above specification of my new and useful improvement in air heatingfurnaces signed and witnessed this 17th day of J anuary 1855.

WILLIAM SAGE.

Witnesses:

Z. G. ROBBINS, GEO. SMITH.

